Bulk flow properties of sieved samples of a ceramic powder at ambient and high temperature

• A High Temperature Annular Shear Cell was used with ceramic powders.
• Powder flow properties were measured at ambient temperature and at 500 °C.
• The combined effect of particle size and temperature was assessed.
• A model was used to relate powder tensile strength to interparticle forces.
• The model correctly describes the effect of consolidation and temperature.

The flow properties of five samples of a ceramic powder, characterized by different particle size distributions were measured at ambient temperature and at 500 °C with the High Temperature Annular Shear Cell. A significant increase of powder cohesion was observed at high temperature. A model combining a continuum approach and a particle–particle interaction description was used to correlate the powder tensile strength with the interparticle forces. The dependence of the tensile strength on powder consolidation and temperature is correctly described by the model.

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